Resign too early?

In this game, black resigned after white queen put his king in check, I was wondering why?  There are still moves to be made, and I dont see a mate anytime soon.  Also, mistakes could be made.  I learned a while back that early resignations were one of my downfalls.  I am not trying to be completley ignorant of the situation, but if someone could comment on how this game is completley over for black, please do...Enhance my perspective of this game and future moves.